Save Output of Python Program to TXT File: Tips & Tricks

[mr.me]

This isn't exactly part of my homework but I wanted to know how I could save the output of this program to txt file?

The program was my homework and it was to allow the user to enter the starting values for a multiplication tables columns and rows and print a 10x10table

I did it like so..

print "To create a '10x10' multiplication table: "
row = int(raw_input("Enter the first row number: "   ))
col = int(raw_input("Enter the frist column number: "))

lastRow = row + 10                          # These lines assign  the value  of the variables
firstRow=col
lastCol = col + 10

print "   ",  

while (col<lastCol):                # loop from col to col + 10
    print "%3d" % col,              #each iteration prints the column header value.
    col+=1                          
print "\n","-"*50,
col=firstRow                        #reset col values

  

#end loop
print  #moves to the next line

while (row < lastRow):                      #This line creates the conditions in which both loops operate            
    print row,"|",                          #Prints a header for each row                                                 
    while(col < lastCol):                   #This line creates the conditions for the inner loop
        print "%3d" %(col * row),          
        col +=1    

            

    col=firstRow                            #This line  updates the value for which "col"     
    row +=1                                  #This line updates the value for "row"
    print

Is there a way I could save the printed values to a file?

 

[Mark44]

See section 7.2 Reading and Writing Files in the python docs - http://docs.python.org/tutorial/inputoutput.html

 

[chroot]

mr.me, I will add that your code is very "un-Pythonic." It does not use any of the nifty features that make Python easier to use than other languages. Here's a more elegant version that uses implicit looping constructs:

print "To create a '10x10' multiplication table: "
firstRow = int(raw_input("Enter the first row number: "   ))
firstCol = int(raw_input("Enter the frist column number: "))

for row in range(firstRow, firstRow+10):
    cols = range(firstCol, firstCol+10)
    values = [ "%3d" % (row * col) for col in cols ]
    print "|".join(values), "\n", "-"*40

- Warren

 

[NascentOxygen]

You can run your program from the command line, something like this:
python myprog.py

Using the operating system, instead of modifying your program in any way, you can save a program's normal output to a file like this:
python myprog.py > myresults.txt

and the output will be saved on a file by that name in your current directory.

 

[LudusRex]

Yes, there are multiple ways to save the output of a Python program to a text file. One way is to use the "print" function to write the output to a file instead of printing it to the console. For example, you could use the following code:

# Open a file for writing
output_file = open("output.txt", "w")

# Write the output to the file
output_file.write("To create a '10x10' multiplication table: \n")

# Get user input
row = int(raw_input("Enter the first row number: "))
col = int(raw_input("Enter the first column number: "))

lastRow = row + 10
firstRow = col
lastCol = col + 10

# Write column headers to file
output_file.write(" ")
while (col < lastCol):
output_file.write("%3d" % col)
col += 1
output_file.write("\n")
output_file.write("-" * 50 + "\n")

# Reset col values
col = firstRow

# Write table rows to file
while (row < lastRow):
output_file.write("%d | " % row)
while (col < lastCol):
output_file.write("%3d" % (col * row))
col += 1
col = firstRow
row += 1
output_file.write("\n")

# Close the file
output_file.close()

This code will create a file called "output.txt" and write the output of the program to it. Another way to save the output is to use the "sys" module and redirect the output to a file. For example, you could use the following code:

import sys

# Open a file for writing
output_file = open("output.txt", "w")

# Redirect the output to the file
sys.stdout = output_file

# Print the output as before
print "To create a '10x10' multiplication table: "
row = int(raw_input("Enter the first row number: "))
col = int(raw_input("Enter the first column number: "))

lastRow = row + 10
firstRow = col
lastCol = col + 10

print " ",
while (col < lastCol):
print "%3d" % col,
col += 1
print "\n", "-" * 50,
col = firstRow
print
while (row